US3304002A - Dual-piloted thermostatically controlled diaphragm valve - Google Patents

Dual-piloted thermostatically controlled diaphragm valve Download PDF

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Publication number
US3304002A
US3304002A US426263A US42626365A US3304002A US 3304002 A US3304002 A US 3304002A US 426263 A US426263 A US 426263A US 42626365 A US42626365 A US 42626365A US 3304002 A US3304002 A US 3304002A
Authority
US
United States
Prior art keywords
pressure
valve
fluid
main chamber
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US426263A
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English (en)
Inventor
Richard D Grayson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to US426263A priority Critical patent/US3304002A/en
Priority to CH44466A priority patent/CH445224A/de
Priority to DE19661526237 priority patent/DE1526237A1/de
Priority to NL6600595A priority patent/NL6600595A/xx
Priority to FR46309A priority patent/FR1466679A/fr
Priority to AT45766A priority patent/AT273426B/de
Priority to BE675235D priority patent/BE675235A/xx
Priority to ES0321917A priority patent/ES321917A1/es
Application granted granted Critical
Publication of US3304002A publication Critical patent/US3304002A/en
Anticipated expiration legal-status Critical
Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/12—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid
    • G05D23/125—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow
    • G05D23/126—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube
    • G05D23/127—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube to control a gaseous fluid circulation
    • G05D23/128—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube to control a gaseous fluid circulation the fluid being combustible
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/0402—Control of fluid pressure without auxiliary power with two or more controllers mounted in series
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type

Definitions

  • piloted diaphragm valves in which a pilot valve is controlled by a thermal actuator to open and close a main valve for the controlled passage of fluid therethrough. It is also known to control fluid pressure by controlling the outward flow of fluid from the valve diaphragm chamber.
  • these systems have the disadvantage that a desirable low-flow condition cannot be established since the valve is moved from the olf position to the fully-on position under control of the thermostatic mechanism.
  • one object of the present invention is to overcome the foregoing disadvantage by providing a pair of sequentially operated pilot valves which control the operation of the valve from an off position to low-flow condition and, according to continued thermostatically controlled demand, to control the operation of the valve from a low-flow condition to a high flow condition.
  • a feature related to the above object is concerned with providing 'a pair of pilot pressure regulators for respective pilot valves to regulate the fluid pressure at the lowflow or high-flow levels.
  • Another object is to provide a dual-piloted thermostatically controlled diaphragm valve wherein a common thermal actuator responding to a single temperature responsive device controls both pilot valves.
  • Still another object is to provide adjusting means for controlling the pilot valves to be responsive at various selected temperatures.
  • a further object is to provide means for controlling at least one of the pair of pilot valves to move from one position to another by snap-action movement.
  • the main fluid flow is controlled by a main single diaphragm valve which serves to regulate the fluid supply to an associated burner, either at high pressure position for full flow, at low pressure position for reduced flow, or at off position; all positions controlled by a thermostatic device.
  • the diaphragm valve acts as a pressure regulator, varying its opening as required to produce a constant outlet pressure at a preset level.
  • the diaphragm valve is governed by a thermostatic pilot control mechanism which includes a well-known temperature sensing bulb.
  • the desired temperature is selected by setting a temperature dial to a desired point.
  • the diaphragm valve will open and regulate the outlet pressure at a low level. If the temperature continues. to drop, the valve will modulate to a high ice full-flow level. Subsequently, the valve may modulate between low and high levels in response to small temperature changes in the vicinity of the thermal responsive device.
  • valve will proportion to a low-flow level or position as the temperature reaches the selected setting. If the temperature increases beyond the selected setting, the valve will assume its off position.
  • valve body having cooperating lower and upper casings 1 and 2 with casing 1 having aligned inlet and outlet openings 4 and 5, respectively.
  • a circular partition 6 between the inlet and outlet forms, at its upper end, a raised valve seat 7 engageable with a valve closure member 8 which is suitably secured to a flexible diaphragm 3.
  • the diaphragm 3 is sealingly secured between lower and upper casings 1 and 2.
  • the valve closure member 8 is normally maintained in the closed position shown in the drawing and is opened to a first orlow flow position by operation of a first auxiliary valve 9 and is sub sequently opened to a second or high-flow position by operation of a second auxiliary valve 10.
  • closure member 8 The amount of opening of closure member 8 to low-flow or high-flow position is controlled by respective pressure regulators -11 and 12 which regulate the pressure in outlet 5.
  • pressure regulators -11 and 12 which regulate the pressure in outlet 5.
  • the operation of the closure 8 to its two open positions, the operation of auxiliary valves 9 and 10, and the function ing of pressure regulators 1.1 and 12 will become more apparent from the following description.
  • a pair of pressure regulator casings 13 and 14 are se-.
  • the diaphragms 15 and 16 each include a valve stem 17 and 18, respectively, which are rigidly secured at one end to respectively corresponding diaphragm plates 19 and 20.
  • the other ends of the valve stems are centrally positioned within respectively correspondingly valve seats 21 and 22.
  • the valve stems 17 and 18 are normally biased out of seating relationship with their respective seats 21 and 22 by springs 23 and 24 urging the diaphragm plates .19 and 20 in a downward direction.
  • the tension of springs 23 and 24 is adjustable by adjustment screws 25 and 26.
  • Pilot valve assemblies 9 and 10 are associated with. respective pressure regulators 11 and 12 and the ports 27 and 28 thereof are selectively opened and closed by pilot valve closures 29 and 30 which normally are held in fluid sealing relationship by springs 31 and 32 posi tioned between the closures and a rigidly secured common retaining plate 33 extending between the walls of the upper casing 2.
  • the tension of spring 32 is adjustable by adjusting screw 34 threadingly engaging plate 33.
  • the retaining plate 3 3 also serves as a support for spring 52 which urges diaphragm 3 and closure 8 in its closedillustrated position.
  • the closure members 29 and 30 are elongated rectangular elements having a pivot point socket 35 and 36 located intermediate their ends for receiving respective pivot points 37 and 38.
  • the upper surface of the actuator disc 39 abuts the outer diaphragm 41 of the dual-diaphragmed sensing head 43 preferably at a single point.
  • the sensing head 43 is rigidly secured to a shaft 44 which is arranged for axial movement under control of an axially adjustable shaft 45' of the temperature setting dial 46 which is threadly supported in flange 47 of upper casing 2.
  • a capilliary tube 48 interconnects the chamber enclosed by flexible diaphragms 41 and 42 with the thermal bulb 49.
  • the last-said chamber, the capilliary tube and thermal bulb are completely filled and sealed with a thermal expansive liquid therein.
  • a permanent magnet 50 is rigidly secured in the upper casing 2 in flux-linking relationship with armature 51 which is located in closure 29 intermediate the valve 9 closure end and pivot point 37. Armature 51 is threadedly positioned in closure 29 for adjusting purposes.
  • the described construction defines a main chamber 53 located above diaphragm 3, a first auxiliary chamber 54 located below the diaphragm 15, and a second auxiliary chamber 55 located below the diaphragm 16.
  • the chambers located above diaphragms 15 and 16 are vented to the atmosphere by ports 56 and 57.
  • a passageway 58 interconnects the inlet 4 with the main chamber 53 and a common passageway 60 interconnects chambers 54 and 55.
  • An extension 61 of passageway 60 interconnects both chambers 54 and 55 with outlet 5.
  • closure 29 is urged against movement about its pivot 37 by the attractive force of magnet 50 on armature 51 and spring 31 while closure 30 is urged against movement about its pivot 38 by spring 32.
  • Spring 32 offers greater resistance to the movement of its associated closure than the attractive force of permanent magnet 50 and the compressive force of spring 31.
  • the compressive force of spring 40 when released by the movement of diaphragm 41, overcomes the attractive force of the magnet 50, and the force of spring 31. Accordingly, the closure 29 suddenly pivots about its pivot 29 and opens the port 27 with a snap-action movement.
  • the thermal actuator 39 assumes a tilted position in a clockwise direction.
  • the fluid in main chamber 53 passes through port 27 into chamber 54 which is connected by passageway 61 to the outlet 5.
  • the pressure in the main chamber 53 will thus decrease according to the setting of the tension of spring 23 of the first pressure regulator 11.
  • the reduced pressure in chamber 53 results in a pressure differential across diaphragm 3 which moves in the upward direction and opens closure 8 to permit passage of fluid from inlet 4 to outlet 5.
  • Diaphragm 15 of the pressure regulator 11 will control the position of valve stem 17 in its seat 21 and thereby control the pressure in outlet 5.
  • closure 8 will only open partially and permit a low rate of flow of fluid to outlet from inlet 4.
  • the low-flow of fluid was insutficient to cause an increase in the ambient temperature of bulb 49., the low-flow would continue as described as long as the noted ambient temperature did not change.
  • the pressure regulator 12 is adjusted to permit a greater pressure in outlet 5 and thus creates a greater pressure differential across diaphragm 3 than created by pressure regulator 11.
  • closure 8 would open a greater distance from its valve seat 7 and permit a high-flow of fluid to outlet 5.
  • the shaft of the temperature setting dial could directly contact the actuator 39 on one side of an additional pivot point and the sensing head of the thermal bulb could contact the actuator 39 on the other side of the additional pivot point to define a four-point tilting actuator rather than the disclosed three-point actuator.
  • a fiuid valve for controlling the flow of fluid from an inlet to an outlet in response to the operation of a normally closed pressure responsive diaphragm positioned between a main chamber and said inlet, conduit means interconnecting said main chamber with said inlet to establish a pressure equilibrium therebetween, first and second auxiliary chambers each including passage means interconnecting said auxiliary chambers with said main chamber, a pair of sequentially operable control valves including a pair of unequally biased valve closures for controlling the passage of fluid from said main chamber to said auxiliary chambers through said passage means, conduit means interconnecting said auxiliary chambers with said outlet, pressure regulator means included with each of said auxiliary chambers to control the pressure in said outlet through the last said conduit means, the pressure regulating means for said second chamber being set to provide a higher pressure in said outlet than the pressure regulating means for said first chamber, thermo statically controlled actuator means linked to said control valve closures and operable responsive to temperature variations to sequentially operate said control valves, whereby first and second pressure differentials between said inlet and said main chamber are
  • thermostatically controlled actuator means includes a pivoted element interlinking said closures, movement of said linking element moving said closures in a sequential order as determined by the magnitudes of the biasing forces of said closures.
  • a fluid valve as set forth in claim 3 including magnetic means connected to operate at least one of said closures with snap-action movement.
  • thermostatically controlled means includes a thermal expansion bulb connected to cause movement of said linking element.
  • a fluid valve for controlling the flow of fluid from an inlet to an outlet in response to the operation of a normally closed pressure responsive diaphragm positioned between a main chamber and said inlet, conduit means &
  • first and second auxiliary chambers each including passage means interconnecting said auxiliary chambers with said main chamber, conduit means interconnecting said auxiliary chambers with said outlet, each of said auxiliary chambers including pressure regulating means for controlling the pressure in said outlet through the last-said conduit means, said pressure regulating means being set to provide different pressures in said outlet a pair of sequentially operable control valves for controlling the passage of fluid from said main chamber to said auxiliary chambers, a pair of unequally biased pivoted closures each controlling respective control valves, a pivoted element interlinking said closures and movable in response to actuation of temperature controlled sensing means to pivot said closures in a predetermined sequential order, whereby first and second pressure dilferentials of an amount controlled by said pressure regulators are sequentially established in said main chamber by the pressure controlled passage of fluid from the main chamber to said auxiliary chambers, the establishment of said pressure differentials moving said diaphragm from said closed position to first and

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Temperature-Responsive Valves (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Fluid-Driven Valves (AREA)
US426263A 1965-01-18 1965-01-18 Dual-piloted thermostatically controlled diaphragm valve Expired - Lifetime US3304002A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US426263A US3304002A (en) 1965-01-18 1965-01-18 Dual-piloted thermostatically controlled diaphragm valve
CH44466A CH445224A (de) 1965-01-18 1966-01-13 Steuereinrichtung
DE19661526237 DE1526237A1 (de) 1965-01-18 1966-01-14 Membranventil
NL6600595A NL6600595A (pt) 1965-01-18 1966-01-17
FR46309A FR1466679A (fr) 1965-01-18 1966-01-18 Soupape à diaphragme commandé thermostatiquement et soumis à une double action de guidage
AT45766A AT273426B (de) 1965-01-18 1966-01-18 Membranventil
BE675235D BE675235A (pt) 1965-01-18 1966-01-18
ES0321917A ES321917A1 (es) 1965-01-18 1966-01-18 Una valvula de gas de doble mando de diafragma controlado termostaticamente.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US426263A US3304002A (en) 1965-01-18 1965-01-18 Dual-piloted thermostatically controlled diaphragm valve

Publications (1)

Publication Number Publication Date
US3304002A true US3304002A (en) 1967-02-14

Family

ID=23690044

Family Applications (1)

Application Number Title Priority Date Filing Date
US426263A Expired - Lifetime US3304002A (en) 1965-01-18 1965-01-18 Dual-piloted thermostatically controlled diaphragm valve

Country Status (8)

Country Link
US (1) US3304002A (pt)
AT (1) AT273426B (pt)
BE (1) BE675235A (pt)
CH (1) CH445224A (pt)
DE (1) DE1526237A1 (pt)
ES (1) ES321917A1 (pt)
FR (1) FR1466679A (pt)
NL (1) NL6600595A (pt)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393699A (en) * 1966-06-06 1968-07-23 United Aircraft Corp Over pressure limiter
US3477462A (en) * 1966-06-30 1969-11-11 Itt High capacity pressure regulated gas diaphragm valve
US3880186A (en) * 1974-03-25 1975-04-29 Essex International Inc Flow control devices
US4182488A (en) * 1977-12-30 1980-01-08 Honeywell Inc. Pressure regulator
US4790352A (en) * 1987-08-07 1988-12-13 Honeywell Inc. Slow opening and fast closure gas valve
EP0350084A2 (en) * 1988-07-04 1990-01-10 Bernard Jan Hallers Thermostatic valve for heating and other apparatuses
US20040200530A1 (en) * 2003-04-10 2004-10-14 Honeywell International Inc. Diaphragm-operated fluid flow control valve providing a plurality of flow levels
US20100006165A1 (en) * 2008-07-11 2010-01-14 Honeywell International Inc. Hydraulically actuated pneumatic regulator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455569C2 (de) * 1974-11-23 1983-01-13 Honeywell B.V., Amsterdam Durchflußsteuergerät für Heizgas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743870A (en) * 1952-05-08 1956-05-01 Honeywell Regulator Co Thermostatically operated fuel valve for heat appliances
US2876951A (en) * 1956-10-17 1959-03-10 Baso Inc Fluid pressure operated control devices
US3235180A (en) * 1963-01-18 1966-02-15 Robertshaw Controls Co Combination pressure and temperature control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743870A (en) * 1952-05-08 1956-05-01 Honeywell Regulator Co Thermostatically operated fuel valve for heat appliances
US2876951A (en) * 1956-10-17 1959-03-10 Baso Inc Fluid pressure operated control devices
US3235180A (en) * 1963-01-18 1966-02-15 Robertshaw Controls Co Combination pressure and temperature control

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393699A (en) * 1966-06-06 1968-07-23 United Aircraft Corp Over pressure limiter
US3477462A (en) * 1966-06-30 1969-11-11 Itt High capacity pressure regulated gas diaphragm valve
US3880186A (en) * 1974-03-25 1975-04-29 Essex International Inc Flow control devices
US4182488A (en) * 1977-12-30 1980-01-08 Honeywell Inc. Pressure regulator
US4790352A (en) * 1987-08-07 1988-12-13 Honeywell Inc. Slow opening and fast closure gas valve
EP0302446A2 (en) * 1987-08-07 1989-02-08 Honeywell Inc. Gas control apparatus
EP0302446A3 (en) * 1987-08-07 1990-03-14 Honeywell Inc. Gas control apparatus
EP0350084A2 (en) * 1988-07-04 1990-01-10 Bernard Jan Hallers Thermostatic valve for heating and other apparatuses
EP0350084A3 (en) * 1988-07-04 1990-12-27 Bernard Jan Hallers Thermostatic valve for heating and other apparatuses
US20040200530A1 (en) * 2003-04-10 2004-10-14 Honeywell International Inc. Diaphragm-operated fluid flow control valve providing a plurality of flow levels
US6923204B2 (en) * 2003-04-10 2005-08-02 Honeywell International Inc. Diaphragm-operated fluid flow control valve providing a plurality of flow levels
US20100006165A1 (en) * 2008-07-11 2010-01-14 Honeywell International Inc. Hydraulically actuated pneumatic regulator

Also Published As

Publication number Publication date
DE1526237A1 (de) 1969-12-18
BE675235A (pt) 1966-07-18
AT273426B (de) 1969-08-11
NL6600595A (pt) 1966-07-19
ES321917A1 (es) 1966-10-16
FR1466679A (fr) 1967-01-20
CH445224A (de) 1967-10-15

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Legal Events

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AS Assignment

Owner name: ITT CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606

Effective date: 19831122